Process for the synthesis of zeolites having an aluminosilicate framework belonging to the faujasite structural family, products obtained and their use in adsorption and catalysis
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United States of America Patent
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Dec 6, 1994
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N/A
app pub date -
Aug 27, 1992
filing date -
Aug 28, 1991
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Abstract
An aluminosilicate gel containing a structuring agent ST and having a composition appropriate for crystallizing as a zeolite of the faujasite structural family is prepared, and then subjected to a crystallization to form a zeolite precursor consisting of the said zeolite containing the structuring agent ST in its cavities and channels, and zeolite is produced by calcination of the said precursor. The structuring agent ST consists of at least one compound chosen from the polyoxaalkylamines and/or polyoxaarylamines of general formula: H.sub.(3-y) N[(C.sub.m H.sub.2m-1 X--O).sub.n --R].sub.y (I) in which X denotes a hydrogen atom, a --OH radical or an alkyl or aryl group which may be different from one unit to the next, R represents a hydrogen atom or a C.sub.1 to C.sub.3 alkyl radical which may be different from one chain to the next, m is equal to 2 or 3 and may be different from one unit to the next, n is a number ranging from 1 to 4 and y a number ranging from 1 to 3.
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